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code help

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40

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phils94850
Posts: 1156
Joined: 11 July 2006
Year and Model: 2009 s60 turbo
Location: Indiana
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code help

Post by phils94850 »

Finally got the codes read on my wifes 2000 S40T..

P0420- catalyst effeciecncy below threshold bank 1

P0102- Maf or VAF A circuit low input

Any ideas on fixing these problems ??
1996 Platinum Edition

FlyingVolvo
Posts: 1822
Joined: 8 March 2009
Year and Model: 2000 V70XC
Location: USA
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Post by FlyingVolvo »

How is the car running? if it's very rough and doesn't idle well, I'd suspect the Mass Airflow sensors based on the code, and that could potentially affect the Cat Converter code.

The CatCon code could also be a fritzy rear O2 sensor, or the cat has actually crapped out.
2000 V70XC - 340,000 miles
Hilton Tune, 16T Turbo, Mototec 3" downpipe, Blue injectors, IPD Short Ram Filter, Snabb Intake Piping & RIP kit, do88 Intercooler, TME Dual Exhaust, HID Projectors, R Panels, do88 Silicone Hoses

2023 V60 T8 PE

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phils94850
Posts: 1156
Joined: 11 July 2006
Year and Model: 2009 s60 turbo
Location: Indiana
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Post by phils94850 »

the car runs pretty good... it seems like it wants to idle kinda low with the a/c on, but, otherwise runs good..
1996 Platinum Edition

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